Circular glass-cutter.



C. F. DOERR.

CIRCULAR GLASS CUTTER.

APPLICATION FILED APR-12,1915.

1, 179,706. Patented Apr. 18,1916.

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THE COLUMBXA PLANOGRAFH 00., WASHINGTON. n. C.

r. uranium, VOFIYONKERS, NEWYoRK, AssmnoR-To si/iirrrcc HEMENWAY COMPANY, INCORPORATED, on NEW YO K, N. Y.,.A CORPORATION on NEW YORK. I

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To a l l iohoa n'it may concern: "Be it known that I, CARL F. Donna, a citizen of the United States, residing'at Yonkers, in the county of Westchester and State "off-New York, have invented certain new anduseful Improvements in Circular. Glass- Cutters, of which the following is, a' specification, reference-being had'therein to the accompanying drawing. 7

Thls invention relates to certain new and useful improvements 1n circular glass cutters; the object ,being'to provide a circular vide a glass cutter with a base having a rev- 1 oluble block mounted thereon in such a manner that the same can yield so as to bring the cutter into engagement with the glass being cut. 1

Another object of the invention is to provide clamping meansffor the-glass cutter which will clamp various forms of cutter in such a manner that they will be held rigid I in position to operate upon the glass being cut.

' Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims. I

In the drawings Figure 1, is a perspective of my improved form of glass cutter; Fig.

2, is a section taken on the line 2-2 of Fig.

1; Fig. 3, is a section taken on the line 33 of Fig. 1; and Fig. 4:, is a perspective of the block carried by the radius bar and the clamping means, showing a cutter ready to be inserted. I

Like numerals of reference refer to like I 7 parts inthe several figures of the drawings.

In carrying out my invention, I employ a circular base 1 which is preferably pro- ,vided with a leather facing 2 forming a frictional surface so as to hold thebase firmly in position upon the glass; sald base being provided with-a central vertically disposed stud 3 having a threaded upper end 4. as clearly shown in Fig.3. Arranged over the stud is a ryieldable washer 5 formed of 7 any suitable material upon which a bearing washer 16 is mounted forming a bearing for a block 7 revolubly mounted upon the stud Specification of Letters Patent.

v'cmcumin GLASS-CUTTER. I

Patented Apr. 18, 1916..

Application filed April 12, 1915. Serial No. 20,897.

which issecured in position thereon by a thumb nut 8 working on. the threaded end of the stud 3, said thumb nut being provided with a'depression to receive thethurnb in order to hold the base at xa fixed point. block 7 provided with a horizontally dis posed opening 9 preferably rectangular in cross section-in which is, slidably mounted a radiusbar 10 conforming inshape to that of the opening, said radius bar being locked in adjusted position therein 'bya thumb screw 11 working in a threaded bore formed.

in the block which intersects the opening so as to allow the end of the thumb screw to engage the bar and hold the same securely.

Secured to one end of the bar 10 is a head member 12 provided with a vertically disposed extension 13 forming a substantially rlght-angled shoulder 14 adapted to receive an ordinary form of glass cutter as shown at 15, said head being provided with a threaded bore 16 into which is adapted to be screwed a wing screw 17 which is provided'with a washer 18 for engaging one face of the glass cutter 15,- said screw passmg through one of the notchesordinarily formed in glass cutters of this kind, so as to hold the glass cutter in a rigid position within the socket as shown in Fig. 1.

It will be seen that by operating the wing screw the glass cutter can be easily inserted or detached from the head and in the form of head herein shown, the upper portion of the socket is beveled as shown at 19 to receive a portion of the handle of the glass cutter of the construction as herein shown but it is, of course, understood that glass cutters with other constructions of handle can be used in connection with the clamping i device without departing from the spirit of my invention.

From the foregoing description, it will be seen that Ihave provided a circular glass cutter with a base for maintaining a fixed point for the radius arm which is so mounted that the same is allowed to yield in order to throw the cutter into engagement with The glass cutter, comprising albase. having I I clairnz n 1. A glass cutterg'comprisihgfabase'hav ing a revoluble block carrying a radius" bar, a head fixed on said bar prov-ided with a substantially right-angled;"shoulder, said; headhaving a threaded bore in theend thereof a screw carrying a washer"and: working within said'bore' for clamping a glass cutter against said head in contact with said shoulder.

2; As a new article of manufacture;

revoluble block carrying a radius bar, headfixed on-one end of saidbar having vertically'disposed extension said head be 'inglprovided withathreadedzborel in its "end spaced from said extension; a clamping said screw and clamped thereby against the Copies of patent lie obtained for five cents each g. the :C ninlssioner of; repeats,

' I 1 9 Wash1ng o ;1).G- I

enql ofsaid headgwith he edge thereof in i contact with" 'said' extensionl f I 25: c

glass cutter, comprisi g a base; having a, revoluble block carr yi rig'a radius; bar having a head-provided with an extension 25 c fiorminga' shoulder at right aI-i'gles 'to .the' face ofsaidhead, saidhead being provided -with a threaded bore, a screw car'rying; a

washerand working in saidlthreaded bo're; and. a-glass cutter: having a notchto receive 30 said screw and having its edge in contact with said shoulder, said glass "cutter being v clamped against the end of said head-'bythe" 1 WiLSh'erof'saidlscrew. I In testimony whereofiI hereunto aflix my signature in. the presence of twofwitnesses. a A L' ER .v -;\/Vitnesse's:.f Y "E I-ZGEoRGE B HRENS, v.

'. 'JrFiHE MENWA Ya 

